Arterial identity and Notch signal are enhanced in ncor2 morphants and fos overexpressed embryos. (A) The expression pattern of dll4 and ephrinB2a in the control, ncor2 morphants, and fos-overexpressed embryos at 24 hpf. (B) Cryosectioning and confocal imaging revealed the enlarged artery in ncor2 morphants and fos-overexpressed embryos at 36 hpf, compared with the controls. (C) The quantification of the diameter of the dorsal aorta shown in (B) (mean ± SEM, n = 12, *P < .05). (D) qPCR result demonstrated Notch targets her2, her5, her6, her9, and hey12 were increased in ncor2 morphants and fos-overexpressed embryos at 24 hpf. (mean ± SD, n = 3, *P < .05).